Are you about to add some functions related to game physics or network gaming?

Support for network won't be implemented for sure, because jPCT basically is a 3D engine/API and not a full-blown game engine. The same is (almost) true for physics. To build a generic physics engine would a project of its own. Some basic methods that should help you doing your own physics should be there, maybe some more are needed. If this is the case, i'll think about adding them but i won't head for a complete physics engine myself in the near future.